/*
 * The MIT License
 *
 * Copyright 2012 http://generic-toolset.googlecode.com.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.rlpw.util;

/**
 * A simple class to store two values ​​in a pair.
 * 
 * @param <L> the type of the left element
 * @param <R> the type of the right element
 */
public class Pair<L, R> {

    private L left;
    private R right;

    /**
     * Constructs an Pair of the specified values.
     * 
     * @param left the left element
     * @param right the right element
     */
    public Pair(L left, R right) {
        this.left = left;
        this.right = right;
    }

    /**
     * Returns the left element. 
     * 
     * @return the left element
     */
    public L left() {
        return left;
    }

    /**
     * Returns the right element.
     * 
     * @return the right element
     */
    public R right() {
        return right;
    }

    @Override
    public String toString() {
        return "<" + left.toString() + ", " + right.toString() + ">";
    }

    @Override
    public boolean equals(Object arg0) {
        try {
            @SuppressWarnings("unchecked")
            Pair<L, R> p = (Pair<L, R>) arg0;
            return (left().equals(p.left()) && right().equals(p.right()));
        } catch (Exception e) {
            return false;
        }
    }
}
